And that leads on to a further point. Emotion and desire are very closely connected with the will. A man's moral insight and the development of his thought about moral questions depend very largely upon the extent to which he acts up to whatever light he has. Vice, as Aristotle put it, is _phthartike arches_--destructive of moral first principles. Moral insight is largely dependent upon character. And so is religious insight. Thus it is quite true to say that religious belief depends in part upon the state of the will. This doctrine has been so scandalously abused by many Theologians and Apologists that I use it with great hesitation. I have no sympathy {131} with the idea that we are justified in believing a religious doctrine merely because we wish it to be true, or with the insinuation that non-belief in a religious truth is always or necessarily due to moral obliquity. But still it is undeniable that a man's ethical and religious beliefs are to some extent affected by the state of his will. That is so with all knowledge to some extent; for progress in knowledge requires attention, and is largely dependent upon interest. If I take no interest in the properties of curves or the square root of -1, I am not very likely to make a good mathematician. This connexion of knowledge with interest applies in an exceptional degree to religious knowledge: and that is one of the points which I think many religious thinkers have intended to emphasize by their too hard and fast distinctions between faith and knowledge.